The Cg Tutorial: The Definitive Guide to Programmable Real-Time Graphics

Chapter 2. The Simplest Programs

This chapter introduces Cg programming through a series of simple vertex and fragment programs. The chapter has the following four sections:

• “A Simple Vertex Program” presents a straightforward vertex program and explains the basic elements and syntax of the Cg language.

• “Compiling Your Example” explains how to compile programs for different GPUs, using the concept of profiles.

• “A Simple Fragment Program” defines a basic fragment program and introduces fragment profiles.

• “Rendering with Your Vertex and Fragment Program Examples” shows how to render simple geometry with OpenGL or Direct3D. This section also mentions the concept of clipping.

A Simple Vertex Program

Green is the color associated with inexperience and growth, ...